Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantas marcas existem quando os tackles são 3?
 ###Tabelas: CREATE TABLE campaign_expenses (campaign_expenses_id AUTO_INCREMENT PRIMARY KEY, Candidate (Party) VARCHAR, Amount raised ( PHP ) VARCHAR, Amount spent ( PHP ) VARCHAR, Votes INT, Spent per vote ( PHP ) VARCHAR, Spent per voter ( PHP ) VARCHAR) CREATE TABLE preliminaries_scores (preliminaries_scores_id AUTO_INCREMENT PRIMARY KEY, Province VARCHAR, Swimsuit INT, Evening Gown INT, Interview INT, Average INT) CREATE TABLE 1959 (1959_id AUTO_INCREMENT PRIMARY KEY, Title VARCHAR, Series VARCHAR, Director VARCHAR, Production Number INT, Release date VARCHAR) CREATE TABLE season_statistics (season_statistics_id AUTO_INCREMENT PRIMARY KEY, Year INT, Team VARCHAR, Number INT, Games INT, Kicks INT, Handballs INT, Total Disposals INT, Marks INT, Tackles INT, Goals INT, Behinds INT, Goal Accuracy % VARCHAR, Brownlow Medal Votes INT) CREATE TABLE largest_cities (largest_cities_id AUTO_INCREMENT PRIMARY KEY, City proper VARCHAR, Population City limits in millions INT, Density per km² INT, Urban area VARCHAR, Population Urban area in millions INT, Metro area VARCHAR, Population Metro area in millions VARCHAR)  
SELECT Marks FROM season_statistics WHERE Tackles = 3